Records of the Geological Survey of India, Volume 112, Parts 3-5

analyses Assam assemblage associated average bands barytes basin beds bodies borehole Chalk Hills channel chemical clay coal collected composition deposits depth developed direction district drilling dykes east eastern elements exposed faults fauna field folds Formation fossil garnet Geol Geological Survey gneisses grains granite Group Hills indicate iron length limestone located lower mapping marine metres minerals nature noted Nummulites observed occur olivine origin phyllite places Plate Pleistocene present quartz quartzite range recorded region Report represented resistivity river rocks samples sand sandstone SCALE schist seam sedimentary sediments seen sequence sericite Series shales shear soil southern stage stratigraphic strike structures studies suggested surface Surv Survey of India Table Tertiary thickness tion trace traverse trend ultramafic units Unpublished Upper uranium valley values varies veins western zone